1、 Introduction to Indoor Environmental Noise Monitoring and Display System

The BYZ01-LED indoor environmental noise monitoring and display system is an online device developed and produced by Shenzhen Boyunchuang Environmental Technology Co., Ltd. for the recent indoor environmental noise pollution. It is mainly used to measure the current indoor environmental noise concentration value, provide effective monitoring data, and remind the current environmental personnel to pay attention to the noise impact, so that the personnel in the environment can have a comfortable working and living state. The product adopts original imported sensors and computing chips, which have the characteristics of high precision, high resolution, and good stability. Widely used in environmental places such as offices, libraries, hospitals, elderly activity centers, schools, factories, etc.

2、 Introduction to Noise

Noise is a type of sound that causes irritability or excessive volume, posing a threat to human health. Noise pollution mainly comes from transportation, honking, industrial noise, construction, social noise such as music halls, loudspeakers, morning markets, and loud human voices. Research has shown that when the noise level is 90 decibels, the sensitivity of rod cells in the retina to distinguish light brightness begins to decrease, and the response time to recognize weak light is prolonged; When reaching 95 decibels, the pupils will dilate; When reaching 115 decibels, the adaptability of the eyes to light brightness will decrease by 207. In addition, people who are exposed to noise for a long time are most likely to experience eye fatigue, eye pain, blurred vision, and tears.

3、 Noise standards

Noise level	Environmental standards (based on the hearing of ordinary people)
0～20 dB	Very quiet, almost imperceptible;
20～40 dB	Quiet, like soft whispers;
40～60 dB	General and ordinary indoor conversations;
60～70dB	Noisy and nerve damaging;
70～90dB	It's very noisy and nerve cells are damaged.
90～100dB	Increased noise and hearing loss;
100～120dB	Unable to tolerate, temporarily deaf after just one minute.
Above 120dB	Extremely deaf or completely deaf

4、 Main features of indoor environmental noise monitoring and display system
1. Stable and reliable communication, wide range power supply DC12-24V;

2. Complete anti reverse, overvoltage, overcurrent, and inter line protection capabilities;

3. Carefully designed circuit software and hardware, with low failure rate and short stability time;

4. Original imported sensors and professional grade signal processing chips ensure the accuracy of sensor data;

5. The measurable environmental parameters cover a wide range and can meet various detection environment requirements;

6. Output 4-20mA, 0-10V, RS485, and other signals can be freely selected for easy use;

7. Equipped with a large LED screen display for real-time observation of data.

5、 Technical parameters of indoor environmental noise monitoring and display system

Technical Parameter	BYZ01-LED
Detection parameters	noise
Detection Principle	Principle of Electrified Capacitor
measuring range	30-130dB
resolution	0.1dB
accuracy	≤±1.5dB
response frequency	20Hz~12.5kHz； A weighted characteristic
Response time (T90)	＜60S
service life	More than 5 years
Supply Voltage	DC 12-24V (with power adapter for 220V)
Display mode	External wall mounted LED display screen, dual color display, high brightness
size	Detector: 195 * 115 * 35mm, Display Screen: 638 * 334 * 55mm
transmission mode	433 wireless transmission
Distance	1000m in an open environment
work environment	-10～50℃； 0-95% RH (no condensation)
Environment	-30～60℃； 0-100% RH (no condensation)
notes	……